Yet another update

This update just shows off the bottom panel more than anything else, there has been lots of other work within the project.  An extra 2 vehicles have been added with different characteristics, towers are now upgradable and sellable.  There is also multiple start and end points.

Like i said above, it's mainly background programming and tidying up, I'm now connecting the nodes  to the tiles so I can build mutiple layered tiles up, this can give me graphics over the top of the main scenery, so I can have bridges and stuff like that.

Another YouTube Video
http://www.youtube.com/watch?v=GBB8oU1HxG4